1. The problem statement, all variables and given/known data http://img297.imageshack.us/img297/2951/picqk5.th.jpg [Broken] I'm just trying to do part a for the moment. 2. Relevant equations 3. The attempt at a solution My initial attempt was just trying to find the impedance of the 5 mH inductor and saying that would be Zin. Unfortunately that doesn't seem to be the case. Then I tried doing a thevenin type problem where I find the impedance of all the elements to the right of the inductor, but that doesn't seem to work either. I also just tried finding Zeq for the whole thing but that doesn't work either, hmm. How does one find the impedance between two nodes? I would have thought that the 2nd method would have worked for sure.